Retrofitting - UFH - Wundatherm Rapid Response vs Screed kit
Hello,
We are considering to get rid of our radiators and wanted to retrofit UFH, we want to go ahead with Wunda's products and I wanted to double check what the difference is with using the board based Wundatherm rapid response, against the Screed based kits? As the screed based kits are cheaper, can they be used for a retrofit? Any advantage vs disadvantage of one system over the other apart from the costs?
How old is your house? It may already have some floor installation?
5mm XPS isn't very much insulation. Ideally you would want 10 to 40 times that, but that would not be practical.
I would go online and look up a floor u value calculators and play with that.
That will tell you the floor u value, which is the amount heat you loose downwards in watts per m2 per degree.
So if you have a 30 degree mean flow temp, the ground is 8, you have a delta T of